Add operator!= to PlatformThreadRef

Add operator!= to PlatformThreadRef

Per the C++ Style Guide:
If you define an operator, also define any related operators that make
sense, and make sure they are defined consistently.
https://google.github.io/styleguide/cppguide.html#Operator_Overloading

BUG=

Review-Url: https://codereview.chromium.org/2702403014
Cr-Commit-Position: refs/heads/master@{#453137}
Committed: https://chromium.googlesource.com/chromium/src/+/f82ecaeb1f5c38130c80f479c418eb21a412ab88

[robliao, 2017-02-24 18:14:44]

robliao@chromium.org changed reviewers:
+ gab@chromium.org

[robliao, 2017-02-24 18:14:50]

The CQ bit was checked by robliao@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-02-24 18:15:16]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[gab, 2017-02-24 18:45:19]

Thanks, lgtm

[commit-bot: I haz the power, 2017-02-24 20:19:09]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-24 20:19:10]

Dry run: This issue passed the CQ dry run.

[robliao, 2017-02-27 00:01:06]

The CQ bit was checked by robliao@chromium.org

[commit-bot: I haz the power, 2017-02-27 00:01:12]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-27 01:59:40]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488153666416560, "parent_rev":
"d7e0002a7d8f98fe00f51a9d187816cdab1c527e", "commit_rev":
"f82ecaeb1f5c38130c80f479c418eb21a412ab88"}

[commit-bot: I haz the power, 2017-02-27 02:00:38]

Description was changed from

==========
Add operator!= to PlatformThreadRef

Per the C++ Style Guide:
If you define an operator, also define any related operators that make
sense, and make sure they are defined consistently.
https://google.github.io/styleguide/cppguide.html#Operator_Overloading

BUG=
==========

to

==========
Add operator!= to PlatformThreadRef

Per the C++ Style Guide:
If you define an operator, also define any related operators that make
sense, and make sure they are defined consistently.
https://google.github.io/styleguide/cppguide.html#Operator_Overloading

BUG=

Review-Url: https://codereview.chromium.org/2702403014
Cr-Commit-Position: refs/heads/master@{#453137}
Committed:
https://chromium.googlesource.com/chromium/src/+/f82ecaeb1f5c38130c80f479c418...
==========

[commit-bot: I haz the power, 2017-02-27 02:00:39]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/f82ecaeb1f5c38130c80f479c418...